What I can't find now are the scholarly articles from the 1970s referring to the same sex bonding and copulating as repugnant and aberrant. A New York Times overview that discusses the albatrosses, who will be making an appearance in the next chapter, is here. The Wiki article is a very good basic primer and is well-cited, though it gets a lot of its information from the book Biological Exuberance by Bruce Bagemihl which I have refrained from buying. If that book is wrong, the Wiki article is wrong, which is why I was glad to find the other citations and more recent articles.